CN203453296U - Rolling bearing unit for wheel bearing - Google Patents
Rolling bearing unit for wheel bearing Download PDFInfo
- Publication number
- CN203453296U CN203453296U CN201320324811.8U CN201320324811U CN203453296U CN 203453296 U CN203453296 U CN 203453296U CN 201320324811 U CN201320324811 U CN 201320324811U CN 203453296 U CN203453296 U CN 203453296U
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- Prior art keywords
- race track
- outside
- described outside
- outer race
- diameter
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Abstract
The utility model provides a rolling bearing unit for a wheel bearing. A structure capable of ensuring rolling fatigue life, moment rigidity and durability is realized in a different-pitch circle diameter (PCD) type rolling bearing unit for the wheel bearing. The rolling bearing unit comprises an outer ring, a hub and a plurality of balls, wherein an external outer ring track is arranged at a part, close to the axial outer end, of the inner circumferential surface of the outer ring; an external outer ring groove shoulder is arranged at the axial inner end of the external outer ring track; an external inner ring track is arranged in the middle of the outer circumferential surface of the hub; an external inner ring groove shoulder is arranged at the axial outer end of the external inner ring track; according to the section shape of the external outer ring track and the external inner ring track, the end edges of a plurality of circular arcs with different curvature radiuses are formed smoothly and continuously along the tangential direction, and the curvature radius of each circular arc is small in the center of the width direction of the external outer ring track and the external inner ring track, and is large in the external outer ring groove shoulder and the external inner ring groove shoulder at two ends of the width direction.
Description
Technical field
The utility model relates to the wheel support roller bearing unit that the wheel of automobile is supported freely with respect to draft hitch rotation.
Background technique
Riding stability while travelling in order to ensure rotation, is used the structure of the ball of multiple row configuration having been given to the combined wrapping angle of pretension and the back side.In recent years, in order to suppress to maximize and guarantee larger torque rigidity, the structure (reducing PCD structure) that example pitch diameter (PCD) such, that make two row balls as described in Patent Document 1 differs from one another has been proposed.
Patent documentation
Patent documentation 1: the JP 2004-108449 of Japan patent Publication
Model utility content
But, at the wheel support of reducing PCD type, use in roller bearing unit, guarantee that at the same time rigidity and durability aspect have the leeway of improvement.About rolling bearing for wheel of the present utility model unit, (1) has outer ring, wheel hub and a plurality of ball.Described outer ring is respectively equipped with by the part of axial outer end with by the part of axial inner ends outside, inner side two outer race tracks that cross section is separately circular arc inner peripheral surface, and described outer ring does not rotate in use yet.And, ring recess shoulder outside the axial inner ends portion by the outside outer race track at the part place of axial outer end of being located at has the outside that internal diameter dwindles.In addition ring recess shoulder outside the axial outer end portion by the part place of axial inner ends and the diameter inner side outer race track different from described outside outer race track of being located at has the inner side that internal diameter dwindles.In addition, described wheel hub is provided with mounting flange outer circumferential face by the part of axial outer end, at the intermediate portion of outer circumferential face, is provided with outside inner race track, in the part by axial inner ends of outer circumferential face, is provided with inner side inner race track.Mounting flange is for supporting wheel.In addition, the cross section of described outside inner race track be circular arc and in axial outer end portion is provided with the outside that external diameter increases ring recess shoulder.In addition, the cross section of described inner side inner race track is that circular arc and diameter are different from described outside inner race track, and in axial inner ends portion is provided with the inner side that external diameter increases ring recess shoulder.In addition, described a plurality of balls roll and arrange freely respectively between described outside, inner side two outer race tracks and described outside, inner side two inner race tracks, described each ball are given to wrapping angle and the pretension of back side contact type.Moreover, make the sectional shape of described outside outer race track and described outside inner race track be, make between the ora terminalis each other of the multiple circular arc that radius of curvature differs from one another the shape forming continuously sleekly along tangent direction each other.And, make the radius of curvature of these each circular arcs in the direction of described wrapping angle, be that the width direction central part of described outside outer race track and described outside inner race track is little, and outside outsides these width direction two ends, at least described in ring recess shoulder and described outside ring recess shoulder side large.
(2) make described outside outer race track width direction central part scope for centered by the direction of described wrapping angle ± scopes (30～50 degree angular ranges) of 15～25 degree.And, the radius of curvature that makes this width direction central part be arranged on described each ball between described outside outer race track and described outside inner race track diameter 52～54%, in the outer race track of described outside, make radius of curvature by the part of ring recess shoulder outside above-mentioned outside be arranged on described each ball between described outside outer race track and described outside inner race track diameter 53～55%.In addition, make described outside inner race track width direction central part scope for centered by the direction of described wrapping angle ± scopes (40～60 degree angular ranges) of 20～30 degree.And, the radius of curvature that makes this width direction central part be arranged on described each ball between described outside outer race track and described outside inner race track diameter 51～53%, in the inner race track of described outside, make radius of curvature by the part of ring recess shoulder in described outside be arranged on described each ball between described outside outer race track and described outside inner race track diameter 52～54%.
(3) except the sectional shape of described outside outer race track and described outside inner race track, also make the sectional shape of described inner side outer race track and described inner side inner race track be, make between the ora terminalis each other of the multiple circular arc that radius of curvature differs from one another the shape forming continuously sleekly along tangent direction each other.And, make the radius of curvature of these each circular arcs in the direction of described wrapping angle, be that the width direction central part of described inner side outer race track and described inner side inner race track is little, and outside inner sides these width direction two ends, at least described in ring recess shoulder and described inner side ring recess shoulder side large.
(4) diameter of described inner side outer race track is greater than the diameter of described outside outer race track, and the diameter of described inner side inner race track is greater than the diameter of described outside inner race track.
According to the utility model, can be at the wheel support of reducing PCD type with in roller bearing unit, realization can either guarantee that rolling fatigue life and torque rigidity can guarantee by suppressing the generation of edge loading the structure of durability again.
Accompanying drawing explanation
Fig. 1 means the sectional view of using the 1st example of roller bearing unit as the wheel support of the utility model object.
Fig. 2 means the A portion enlarged view of Fig. 1 of the 1st example of mode of execution of the present utility model.
Fig. 3 means the sectional view of using the 2nd example of roller bearing unit as the wheel support of the utility model object.
Embodiment
The wheel support of present embodiment has with roller bearing unit 1: outer ring 2, wheel hub 3 and a plurality of ball 4a, 4b.Outer ring 2 is provided with the assembly department 5 to draft hitch on outer circumferential face, is provided with outside outer race track 6 in the axial outside of inner peripheral surface, is provided with inner side outer race track 7 in the axial inner side of inner peripheral surface.The internal diameter of outside outer race track 6 is greater than the internal diameter of inner side outer race track 7, and sectional shape is separately circular arc.Ring recess shoulder 8 outside the axial inner ends portion of outside outer race track 6 is formed with the outside that internal diameter dwindles, ring recess shoulder 9 outside the axial outer end portion of inner side outer race track 7 is formed with the inner side that internal diameter dwindles.
The ball 4a of outer rows and the ball 4b of inner column roll and arrange freely under the state that is held respectively device 19a, 19b maintenance.To each ball, 4a gives wrapping angle α, and to each ball, 4b gives wrapping angle β, has given pretension thus in the wrapping angle of each ball having been given to back side contact type.And, be assembled into wheel support with under the state of roller bearing unit 1, the pitch diameter PCD of the ball 4a of outer rows
oUTbe greater than the pitch diameter PCD of the ball 4b of inner column
iN.
As shown in Figure 2, making the sectional shape of outside outer race track 6 and outside inner race track 15 is to make radius of curvature r
o1, r
o2, r
i1, r
i2the compound circular arc shape that between the ora terminalis each other of the multiple circular arc differing from one another, edge tangent direction each other forms sleekly continuously.And, make the radius of curvature r of these each circular arcs
o1, r
o2, r
i1, r
i2take predetermined range centered by the direction of wrapping angle α of each ball 4a, width direction central part 21a, the 21b of outside outer race track 6 and above-mentioned outside inner race track 15 are smaller value.In contrast, making to be present in from the radius of curvature position of width direction sandwich width direction central part 21a, 21b, width direction two end part 22a, 22b, 22c, 22d is larger value (r
o1< r
o2, r
i1< r
i2).
Particularly, make outside outer race track 6 width direction central part 21a scope for centered by the direction of wrapping angle α ± scopes of 15～25 degree, make the radius of curvature r of this width direction central part 21a
o1for 52～54% of the diameter of each ball 4a.In contrast, make from width direction sandwich width direction central part radius of curvature r 21a, width direction two end part 22a, 22b
o2for 53～55% of the diameter of each ball 4a.
On the other hand, make outside inner race track 15 width direction central part 21b scope for centered by the direction of wrapping angle α ± scopes of 20～30 degree, make the radius of curvature r of this width direction central part 21b
i1for 51～53% of the diameter of each ball 4a.In contrast, make from width direction sandwich width direction central part radius of curvature r 21b, width direction two end part 22c, 22d
i2for 52～54% of the diameter of each ball 4a.
In the situation that roller bearing unit 1a for the wheel support of Fig. 3 is contrary with the structure shown in above-mentioned Fig. 1, make the pitch diameter of the ball 4a of outer rows be less than the pitch diameter of the ball 4b of inner column.
Claims (4)
1. a wheel support roller bearing unit, is characterized in that,
There is outer ring, wheel hub and a plurality of ball, described outer ring has in the part by axial outer end of inner peripheral surface the outside outer race track that cross section is circular arc, and inner peripheral surface by the part of axial inner ends, to have cross section be circular arc and the diameter inner side outer race track different from described outside outer race track, ring recess shoulder outside the axial inner ends portion of described outside outer race track has the outside that internal diameter dwindles, ring recess shoulder outside the axial outer end portion of described inner side outer race track has the inner side that internal diameter dwindles, described outer ring does not rotate in use yet
Described wheel hub has the mounting flange for supporting wheel in the part by axial outer end of outer circumferential face, intermediate portion at outer circumferential face has the outside inner race track that cross section is circular arc, in the axial inner ends portion of outer circumferential face, having cross section is circular arc and the diameter inner side inner race track different from described outside inner race track, ring recess shoulder in the axial outer end portion of described outside inner race track has the outside that external diameter increases, ring recess shoulder in the axial inner ends portion of described inner side inner race track has the inner side that external diameter increases
Described a plurality of ball rolls and arranges freely respectively between described outside outer race track, inner side outer race track two outer race tracks and described outside inner race track, inner side inner race track two inner race tracks,
Described each ball is given to wrapping angle and the pretension of back side contact type, and, make the sectional shape of described outside outer race track and described outside inner race track be, make between the ora terminalis each other of the multiple circular arc that radius of curvature differs from one another the shape forming continuously sleekly along tangent direction each other, make the radius of curvature of described each circular arc in the direction of described wrapping angle, be that the width direction central part of described outside outer race track and described outside inner race track is little, and outside outsides these width direction two ends, at least described in ring recess shoulder and described outside ring recess shoulder side large.
2. wheel support roller bearing unit as claimed in claim 1, is characterized in that,
The scope of the width direction central part of described outside outer race track be centered by the direction of described wrapping angle ± 15～25 degree scopes, the radius of curvature of this width direction central part be arranged on described each ball between described outside outer race track and described outside inner race track diameter 52～54%, in the outer race track of described outside, by the radius of curvature of the part of ring recess shoulder outside described outside be arranged on described each ball between described outside outer race track and described outside inner race track diameter 53～55%, the scope of the width direction central part of described outside inner race track be centered by the direction of described wrapping angle ± 20～30 degree scopes, the radius of curvature of this width direction central part be arranged on described each ball between described outside outer race track and described outside inner race track diameter 51～53%, in the inner race track of described outside, by the radius of curvature of the part of ring recess shoulder in described outside be arranged on described each ball between described outside outer race track and described outside inner race track diameter 52～54%.
3. wheel support roller bearing unit as claimed in claim 1 or 2, is characterized in that,
Except the sectional shape of described outside outer race track and described outside inner race track, also make the sectional shape of described inner side outer race track and described inner side inner race track be, make between the ora terminalis each other of the multiple circular arc that radius of curvature differs from one another the shape forming continuously sleekly along tangent direction each other, make the radius of curvature of described each circular arc in the direction of described wrapping angle, the width direction central part that is described inner side outer race track and described inner side inner race track is little, and at these width direction two ends, outside at least described inner side, in ring recess shoulder and described inner side, ring recess shoulder side is large.
4. wheel support roller bearing unit as claimed in claim 1, is characterized in that,
The diameter of described inner side outer race track is greater than the diameter of described outside outer race track, and the diameter of described inner side inner race track is greater than the diameter of described outside inner race track.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012151293 | 2012-07-05 | ||
| JP2012-151293 | 2012-07-05 | ||
| JP2013-079173 | 2013-04-05 | ||
| JP2013079173A JP2014029202A (en) | 2012-07-05 | 2013-04-05 | Rolling bearing unit for wheel support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453296U true CN203453296U (en) | 2014-02-26 |
Family
ID=50133171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320324811.8U Expired - Fee Related CN203453296U (en) | 2012-07-05 | 2013-06-05 | Rolling bearing unit for wheel bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107848014A (en) * | 2015-07-13 | 2018-03-27 | 日本精工株式会社 | The manufacture method and manufacture device of bearing unit |
| CN109072980A (en) * | 2016-04-20 | 2018-12-21 | Nok株式会社 | Seal construction |
-
2013
- 2013-06-05 CN CN201320324811.8U patent/CN203453296U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107848014A (en) * | 2015-07-13 | 2018-03-27 | 日本精工株式会社 | The manufacture method and manufacture device of bearing unit |
| US10557505B2 (en) | 2015-07-13 | 2020-02-11 | Nsk Ltd. | Method and device for manufacturing bearing unit |
| US11162538B2 (en) | 2015-07-13 | 2021-11-02 | Nsk Ltd. | Method and device for manufacturing bearing unit |
| CN109072980A (en) * | 2016-04-20 | 2018-12-21 | Nok株式会社 | Seal construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20200605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |